How do you know the object you selected in is motion?

The minerals found in bones are deposited by living cells called

If i add water to oil what will happen

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d